Instrument Function
R&S
®
SMBV100A
318Operating Manual 1176.8016.02 ─ 17
"Var. Attenuated"
Enables a precise digital attenuation of the signal. The level of the
baseband and the RF signal is attenuated by the value set with the
parameter Digital Attenuation.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:MODE on page 751
I/Q Level Vp (EMF)
Variable output mode
Sets the output voltage for both signal components. Small differences at the inputs can
be taken into account via impairment settings (see Chapter 5.7.1.4, "Impairment Set-
tings Menu", on page 305).
Single ended Output:
●
Value range: 1 mV ... 1.5 V EMF.
●
The maximum overall output voltage ("Level
EMF
" + |"Bias
EMF
"|) is 3.7 V.
Differential Output:
●
Value range: 2 mV ... 3 V EMF.
●
The maximum overall output voltage ("0.5" * "Level
EMF
" + |"Bias
EMF
"| + "0.5" * "Off-
set") is 3.7 V.
Remote command:
[:SOURce<hw>]:IQ:OUTPut:LEVel on page 751
Digital Attenuation
Var. Attenuated mode
Attenuates the level of the baseband and the RF signal.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:POWer:DATTenuation on page 752
Couple IQ Bias
(Variable output mode only)
Activates/deactivates coupling of bias setting of the I-signal and Q-signal component.
For activated coupling, the setting can be made for the I-signal component, it automati-
cally applies to the Q-signal component as well. The fields for setting the Q-signal com-
ponent are shaded.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:BIAS:COUPling[:STATe] on page 749
Bias (EMF)
Sets the bias. A DC voltage is superimposed upon the I or Q signal. The maximum
overall voltage ("Level
EMF
" + "Bias
EMF
" + "Offset
EMF
") is 3.7 volts.
This way, the operating point of a DUT can be set.
Remote command:
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:BIAS:I on page 750
[:SOURce<hw>]:IQ:OUTPut[:ANALog]:BIAS:Q on page 750
Impairment of Digital I/Q Signal and Noise Generator - AWGN/IMP Block
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